Storage Of Piping; Pipe Processing - Mitsubishi Electric PUHY-RP200 Service Handbook

[ I Read Before Servicing ]

[3] Storage of Piping

1. Storage location
Store the piping materials indoors until they are ready to be installed (e.g., storage room on site or at the installer's premise).
If left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe, resulting in malfunctions.
2. Sealing the pipe ends
Both ends of the pipes should be sealed until just before brazing.
Keep elbows and T-joints wrapped in plastic bags to keep dust, dirt, and moisture out.
The new refrigerant oil is more than ten times as hygroscopic as the conventional refrigerant oil, such as Suniso, and is more
likely to introduce moisture into the system. To prevent the deterioration of refrigerant oil and resultant compressor failure,
store piping materials with special care to keep moisture out.

[4] Pipe Processing

Use a small amount of ester oil, ether oil, or alkylbenzene to coat flares and flanges.
Use a minimum amount of oil.
Use only ester oil, ether oil, and alkylbenzene.
HWE10130
- 5 -
GB